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Direct methane protonic ceramic fuel cells with self-assembled Ni-Rh bimetallic catalyst.
- Source :
-
Nature communications [Nat Commun] 2023 Nov 18; Vol. 14 (1), pp. 7485. Date of Electronic Publication: 2023 Nov 18. - Publication Year :
- 2023
-
Abstract
- Direct methane protonic ceramic fuel cells are promising electrochemical devices that address the technical and economic challenges of conventional ceramic fuel cells. However, Ni, a catalyst of protonic ceramic fuel cells exhibits sluggish reaction kinetics for CH <subscript>4</subscript> conversion and a low tolerance against carbon-coking, limiting its wider applications. Herein, we introduce a self-assembled Ni-Rh bimetallic catalyst that exhibits a significantly high CH <subscript>4</subscript> conversion and carbon-coking tolerance. It enables direct methane protonic ceramic fuel cells to operate with a high maximum power density of ~0.50 W·cm <superscript>-2</superscript> at 500 °C, surpassing all other previously reported values from direct methane protonic ceramic fuel cells and even solid oxide fuel cells. Moreover, it allows stable operation with a degradation rate of 0.02%·h <superscript>-1</superscript> at 500 °C over 500 h, which is ~20-fold lower than that of conventional protonic ceramic fuel cells (0.4%·h <superscript>-1</superscript> ). High-resolution in-situ surface characterization techniques reveal that high-water interaction on the Ni-Rh surface facilitates the carbon cleaning process, enabling sustainable long-term operation.<br /> (© 2023. The Author(s).)
Details
- Language :
- English
- ISSN :
- 2041-1723
- Volume :
- 14
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Nature communications
- Publication Type :
- Academic Journal
- Accession number :
- 37980343
- Full Text :
- https://doi.org/10.1038/s41467-023-43388-8